.container{
    width: 60%;
    margin:0 auto;
    background-color: aqua;
    min-height: 220px;
}
h2{
    text-align: center;
    padding-top:10px;
}
p{
    width: 90%;
    margin:0 auto;
    text-align: center;
}
input{
    box-sizing: border-box;
    width: 60px;
}
#result{
    margin:20px auto;
    height:40px;
    width: 75%;
    padding:20px;
    border:1px dotted goldenrod;
    background-color: rgb(221,220,220);
    font-weight: bold;
    text-align:center;
}